Why do I get System.UnauthorizedAccessException Access to the path 'Google.Apis.Auth' is denied

Question

I have implemented google drive functionality for file management its working fine in local system but whenever i hosted it on Godaddy server it throw following error

System.UnauthorizedAccessException Access to the path 'Google.Apis.Auth' is denied.

Following code i am using :

UserCredential credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
   new ClientSecrets
   {
       ClientId = System.Configuration.ConfigurationManager.AppSettings["GDriveClientId"],//Get ClientID from web.config.
       ClientSecret = System.Configuration.ConfigurationManager.AppSettings["GDriveClientSecret"]//Get ClientSecret from web.config.
   },
   new[] { DriveService.Scope.Drive },
   System.Configuration.ConfigurationManager.AppSettings["GDriveCreatedByUser"],//Get UserName from web.config.
   CancellationToken.None).Result;

return credential;

I am using VS2010,IIS 7 for above functionality

Answer 1

Expanding what Chandrika has already said, the ASP.NET user needs read and write permissions to the Google API Client OAuth2 Library's permanent storage folder .

Its default value is a folder named "Google.Apis.Auth" in Environment.SpecialFolder.ApplicationData (which usually corresponds to C:\Users\your-user-name\AppData\Roaming).

Alternatively, another folder can be provided as the last parameter of the GoogleWebAuthorizationBroker.AuthorizeAsync() method:

var folder = System.Web.HttpContext.Current.Server.MapPath("/App_Data/MyGoogleStorage");

UserCredential credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
   new ClientSecrets
   {
       ClientId = "PutYourClientIdHere",
       ClientSecret = "PutYourClientSecretHere"
   },
   new[] { DriveService.Scope.Drive },
   "user",
   CancellationToken.None,
   new FileDataStore(folder)).Result;

return credential;

See: https://developers.google.com/api-client-library/dotnet/guide/aaa_oauth#credentials and https://developers.google.com/accounts/docs/OAuth2

Answer 2

Root cause of the problem : This issue is generated because after validating authentication request its create directory and token file under in window's user's folder and we have not right's for that folder of Godadday server so it was not working

Solution : Modified the source code of google apis[filedatasource.cs] for creating that file inside our directory and add reference of it and it will work